Double-Exchange Interaction in Optically Induced Nonequilibrium State: A Conversion from Ferromagnetic to Antiferromagnetic Structure

Abstract

The double-exchange (DE) interaction, that is, a ferromagnetic (FM) interaction due to a combination of electron motion and the Hund coupling, is a well known source of a wide class of FM orders. Here, we show that the DE interaction in highly photoexcited states is antiferromagnetic (AFM). Transient dynamics of quantum electrons coupled with classical spins are analyzed. An ac field applied to a metallic FM state results in an almost perfect Néel state. A time characterizing the FM-to-AFM conversion is scaled by light amplitude and frequency. This hidden AFM interaction is attributable to the electron-spin coupling under nonequilibrium electron distribution.

6 pages, 7 figures (including supplemental material)

References in corpus (5)

• Spin Oscillations in Antiferromagnetic NiO Triggered by Circularly Polarized Light
• Ultrafast and reversible control of the exchange interaction in Mott insulators
• Dynamical band flipping in fermionic lattice systems: An ac-field-driven change of the interaction from repulsive to attractive
• Optical freezing of charge motion in an organic conductor
• Photoinduced charge and spin dynamics in strongly correlated electron systems

Cited by in corpus (22)

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• Entropy-cooled nonequilibrium states of the Hubbard model
• Ultrafast coupled charge and spin dynamics in strongly correlated NiO
• Rectification of Spin Current in Inversion-Asymmetric Magnets with Linearly-Polarized Electromagnetic Waves
• Photocontrol of magnetic structure in an itinerant magnet
• Strong light-field effects driven by nearly single-cycle 7-fs light field in correlated organic conductors
• Driving spin chirality by electron dynamics in laser-excited antiferromagnets
• Nonthermal excitonic condensation near a spin-state transition
• Evolution of the magnetic and polaronic order of $\mathrm{P}{\mathrm{r}}_{1/2}\mathrm{C}{\mathrm{a}}_{1/2}\mathrm{Mn}{\mathrm{O}}_3$ following an ultrashort light pulse
• Ultrafast reorientation of the Néel vector in antiferromagnetic Dirac semimetals
• Non-thermal superconductivity in photo-doped multi-orbital Hubbard systems
• Ultrafast optical generation of antiferromagnetic meron-antimeron pairs with conservation of topological charge
• Dynamics of Phase Separated States in the Double Exchange Model
• Photoinduced topological spin texture in a metallic ferromagnet
• High harmonic generation from electrons moving in topological spin textures
• Photocontrol of spin scalar chirality in centrosymmetric itinerant magnets
• Photoinduced 120-degree spin order in the Kondo-lattice model on a triangular lattice
• Multiple Floquet Chern insulator phases in the spin-charge coupled triangular-lattice ferrimagnet: Crucial role of higher-order terms in the high-frequency expansion
• Quench dynamics in the one-dimensional mass-imbalanced ionic Hubbard model
• Electric-Field-Induced Antiferromagnetic Insulating State in a Metallic Ferromagnet
• Mechanism for Synchronization of Charge Oscillations in Dimer Lattices